docs(planning): v2.1 milestone setup + Phase 11 context/patterns
- Archive v2.0 phases (07-10) under .planning/milestones/ - v2.1 REQUIREMENTS/ROADMAP (Phases 11-17: Offer Studio + Proposal AI) - DESIGN-SYSTEM.md (database-view UI contract for Phases 11-14) - Phase 11 CONTEXT, DISCUSSION-LOG, PATTERNS Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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# Phase 9: Quote Builder & Public Routes - Research
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**Researched:** 2026-06-11
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**Domain:** Quote generation UI (admin), public proposal page (client), form state management, pricing calculation, token-gated routes
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**Confidence:** HIGH
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## Summary
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Phase 9 implements a two-part system: (1) Admin Quote Builder to select offers, override pricing, and generate public links; and (2) Public Quote Page for token-gated client acceptance. The architecture leverages Next.js 16 App Router with server actions for secure pricing validation, React Hook Form + Zod for multi-step form validation, and shadcn/ui for consistent UI. The public route `/quote/[token]` mirrors the existing `/client/[token]` token-gated pattern established in Phase 1. Quote state transitions (draft → sent → viewed → accepted/rejected) are enforced at the database level via immutable `accepted_at` timestamp. Pricing calculations must always be validated server-side; client-side previews are optimistic only. Email notifications on acceptance can integrate with Resend and are deferred to Phase 12+.
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**Primary recommendation:** Build the admin Quote Builder as a two-column form (left: offer selection + pricing overrides, right: preview) using React Hook Form with server actions for atomic save-on-change. For the public quote page, implement a multistep wizard (steps 1-3) with a single server action for accept, capturing email and notes. Use database constraints to enforce immutability of `accepted_at` — once set, the UI disables edit buttons and all queries should check `accepted_at IS NOT NULL` to block mutations. Rate-limit public views to 3 per minute per IP using headers middleware or Upstash KV.
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## Architectural Responsibility Map
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| Capability | Primary Tier | Secondary Tier | Rationale |
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|------------|-------------|----------------|-----------|
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| Admin quote builder UI | API / Backend | Frontend Server | Admin workspace; server actions handle pricing validation and offer queries |
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| Public quote view (read-only) | Browser / Client | Frontend Server | Token validation at middleware/page level; client displays pre-calculated data from API |
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| Quote state machine (draft→sent→viewed→accepted) | API / Backend | Database | State transitions via immutable timestamps enforced by database constraints |
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| Pricing calculation & validation | API / Backend | — | Never trust client calculation; server action validates tier selection against offer schema and recalculates total |
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| Token generation & storage | Database / Storage | API / Backend | nanoid tokens stored in `quotes.token` column; API retrieves by token with rate-limit check |
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| Email notification on accept | Backend Service (async) | API / Backend | Server action triggers email dispatch; email integration (Resend) deferred to Phase 12 |
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## Phase Requirements
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| ID | Description | Research Support |
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|----|-------------|------------------|
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| QUOTE-01 | `/admin/quotes/new`: select cliente + 1-3 offerte + override prezzi → genera `/quote/[token]` link pubblico | Admin Quote Builder with form state, offer selection, price override; server action validates and generates nanoid token |
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| QUOTE-02 | Public `/quote/[token]` pagina multistep (Step 1 overview → Step 2 tier selection → Step 3 summary + accept) | Multi-step form with React Hook Form + Zod; each step validates before advancing; Step 3 accepts quote |
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| QUOTE-03 | Accept CTA → `/api/public/quote/accept?token=X` con cattura email + note | Server action or API route receives token, validates quote state, captures email/notes, updates `accepted_at` immutably |
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| QUOTE-04 | Quote token: nanoid 21 char (~122 bits), unico, validato in proxy come `/client/[token]` (nessun login sessione); rate limit 3 views/min per IP | Token passed via URL param; rate limit via middleware or Upstash Redis; no session required |
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| QUOTE-05 | Mai esporre `quote_items` (prezzi per servizio) via public API; client API vede solo `accepted_total` (server-side ClientView type enforces) | Public API returns only `accepted_total` and phase/service summary; quote_items always filtered at query layer |
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## User Constraints (from CLAUDE.md)
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### Locked Decisions
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1. **Stack:** Next.js 16 App Router, Neon Postgres, Drizzle ORM, Auth.js v4, Tailwind v4, shadcn/ui, Zod, nanoid
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2. **Auth pattern:** `/client/[token]/*` uses middleware token check (no session); `/admin/*` uses Auth.js session
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3. **Data safety:** `quote_items` NEVER exposed via client API — only `accepted_total` visible to client
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4. **Immutability:** `accepted_at` immutable once set; quote becomes read-only
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5. **Token design:** Separate rotatable field; `clients.token` is never the primary key
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### Claude's Discretion
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- Email integration timing and provider choice (Resend vs. alternatives) — deferred to Phase 12
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- Public quote page UX details (single page vs. modal vs. multistep wizard) — recommend multistep for clarity
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- Pricing override UI (freeform input vs. slider vs. percentage-based) — recommend structured field validation
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### Out of Scope (Deferred)
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- Email automation and scheduled reminders
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- Quote expiry/deadline enforcement
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- PDF generation of quote (initial link-sharing MVP)
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- Advanced analytics on quote view/accept rates
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## Standard Stack
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### Core
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| Library | Version | Purpose | Why Standard |
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|---------|---------|---------|--------------|
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| next | 16.2.6 | Framework, server actions, middleware | [VERIFIED: npm registry] App Router is stable for Phase 9 workflow |
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| react | 19.2.4 | Component framework | [VERIFIED: npm registry] Latest stable; paired with Next.js 16 |
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| react-hook-form | 7.75.0 | Multi-step form state + validation | [VERIFIED: npm registry] Lightweight, integrates seamlessly with shadcn/ui Form component |
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| zod | 4.4.3 | Schema validation (client + server) | [VERIFIED: npm registry] Type-safe validation; used throughout existing ClientHub actions |
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| @hookform/resolvers | 5.2.2 | RHF + Zod integration | [VERIFIED: npm registry] Official resolver package for Zod schemas |
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### Supporting
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| Library | Version | Purpose | When to Use |
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|---------|---------|---------|-------------|
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| drizzle-orm | 0.45.2 | ORM queries + mutations | Quote schema queries; existing infrastructure already in place |
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| postgres (driver) | 3.4.9 | Neon Postgres connection | Used for all DB operations via Drizzle |
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| nanoid | 5.1.11 | Token generation | Quote token generation (21 char ~122 bits); existing codebase pattern |
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| lucide-react | 1.14.0 | Icons | UI feedback for quote state (accepted, rejected, pending) |
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### Alternatives Considered
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| Instead of | Could Use | Tradeoff |
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|------------|-----------|----------|
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| React Hook Form | Formik | RHF is lighter and pairs better with shadcn/ui; Formik adds overhead for multistep forms |
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| Zod | Joi / TypeScript-based validation | Zod provides runtime + compile-time type safety; Joi requires manual type definitions |
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| shadcn/ui | Material-UI / Chakra | shadcn/ui is already in project; copying components into repo gives full control for customization |
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| Upstash Redis (rate limit) | In-memory cache / Vercel KV | Upstash is cost-effective for low-volume public pages; in-memory doesn't persist across serverless cold starts |
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**Installation:**
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```bash
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npm install react-hook-form @hookform/resolvers zod
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# All other dependencies already installed in Phase 1-8
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```
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**Version verification:**
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[VERIFIED: npm registry] All listed versions match package.json from Phase 1-8 existing setup.
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## Architecture Patterns
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### System Architecture Diagram
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```
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Admin Quote Builder (Private Route /admin/quotes/new)
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├─ Form: Select Client
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├─ Form: Select 1-3 Offers (from offer_micros via Phase 8 schema)
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├─ Form: Override Pricing (per offer or per phase)
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└─ Server Action: createQuote()
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└─ DB: Insert to quotes table (token=nanoid, state='draft', total=calculated)
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└─ Generate public link: /quote/[token]
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↓ (Admin shares link via email — Phase 12)
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Public Quote Page (Token-Gated Route /quote/[token])
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├─ Middleware: Validate token exists + rate-limit (3 views/min per IP)
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├─ Step 1: Overview (read quote details, total price)
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├─ Step 2: Tier/Service Selection (if offer allows, else read-only)
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└─ Step 3: Summary + Accept/Reject Buttons
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└─ Server Action: acceptQuote(token, email, notes)
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├─ Validate token + quote state
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├─ Update quotes.accepted_at = NOW (immutable)
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├─ Trigger notification (Phase 12)
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└─ Return success/error
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Data Flow:
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- Admin creates quote → writes to quotes + quote_items (admin-only)
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- Public page reads quote (token-validated) → returns only summary (no line items)
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- Client accepts → updates accepted_at (immutable, db-enforced)
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- Query layer filters quote_items for admin context only
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```
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### Recommended Project Structure
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```
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src/
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├── app/
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│ ├── admin/quotes/new/
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│ │ ├── page.tsx # Quote builder form page
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│ │ └── actions.ts # createQuote, updateQuote server actions
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│ ├── quote/[token]/
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│ │ ├── layout.tsx # Public quote layout (no auth)
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│ │ └── page.tsx # Multistep quote view + accept flow
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│ └── api/public/quote/
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│ └── accept/route.ts # POST accept endpoint (alt to server action)
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├── components/
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│ ├── admin/quotes/
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│ │ ├── QuoteBuilderForm.tsx # Two-column form (offer + preview)
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│ │ ├── OfferSelector.tsx # Multi-select offer picker
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│ │ ├── PriceOverrideInput.tsx # Price field with validation
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│ │ └── QuotePreview.tsx # Live summary of selected offer + pricing
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│ └── public/quote/
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│ ├── QuoteMultistep.tsx # Wrapper managing step state
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│ ├── QuoteStep1Overview.tsx
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│ ├── QuoteStep2Selection.tsx
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│ ├── QuoteStep3Summary.tsx
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│ └── AcceptQuoteForm.tsx # Email + notes capture
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├── lib/
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│ ├── quote-service.ts # Query layer: getQuoteByToken, calculateTotal
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│ ├── quote-validators.ts # Zod schemas for quote validation
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│ └── rate-limit.ts # Rate limit middleware/helper
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└── db/
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└── schema.ts # quotes, quote_items tables (Phase 8)
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```
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### Pattern 1: Multi-Step Form with React Hook Form + Zod
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**What:** Each step validates its fields before advancing to the next step. Steps share form state via useForm at the parent level. Zod schema can be split per step or combined.
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**When to use:** Public quote page (Steps 1-3); admin quote builder (optional, if multi-step for UX).
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**Example:**
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```typescript
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// lib/quote-validators.ts — Source: [shadcn/ui Form Docs]
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import { z } from "zod";
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export const quoteStep2Schema = z.object({
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tier: z.enum(["A", "B", "C"]).describe("Tier selection"),
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priceOverrides: z.record(z.string(), z.number().min(0)).describe("Price per component"),
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});
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export const quoteAcceptSchema = z.object({
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email: z.string().email("Email valida richiesta").optional(),
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notes: z.string().max(500).optional(),
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});
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// components/public/quote/QuoteMultistep.tsx — Source: [React Hook Form + Next.js Server Actions]
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"use client";
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import { useState } from "react";
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import { useForm } from "react-hook-form";
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import { zodResolver } from "@hookform/resolvers/zod";
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import { z } from "zod";
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const formSchema = z.object({
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// Step 1 is read-only, no form fields
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// Step 2
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tier: z.enum(["A", "B", "C"]).optional(),
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// Step 3
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email: z.string().email().optional(),
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notes: z.string().max(500).optional(),
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});
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export function QuoteMultistep({ quoteToken }: { quoteToken: string }) {
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const [step, setStep] = useState(1);
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const form = useForm<z.infer<typeof formSchema>>({
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resolver: zodResolver(formSchema),
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mode: "onBlur",
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});
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async function onSubmit(data: z.infer<typeof formSchema>) {
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if (step < 3) {
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// Validate step data, advance
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setStep(step + 1);
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return;
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}
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// Step 3: submit accept
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const result = await acceptQuote(quoteToken, data.email, data.notes);
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if (result.success) {
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window.location.href = "/quote/success"; // or redirect to thank you
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}
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}
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return (
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<form onSubmit={form.handleSubmit(onSubmit)} className="space-y-6">
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{step === 1 && <QuoteStep1Overview quoteToken={quoteToken} />}
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{step === 2 && <QuoteStep2Selection form={form} />}
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{step === 3 && <QuoteStep3Summary form={form} />}
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<div className="flex gap-4">
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{step > 1 && (
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<button type="button" onClick={() => setStep(step - 1)}>
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Indietro
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</button>
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)}
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<button type="submit">
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{step < 3 ? "Avanti" : "Accetta Preventivo"}
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</button>
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</div>
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</form>
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);
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}
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```
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### Pattern 2: Server Action for Quote Accept with Immutability Enforcement
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**What:** Single server action receives token + email/notes. Validates quote state, checks `accepted_at` is null, updates timestamp, returns success. Database constraint prevents re-accept.
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**When to use:** Public quote page Step 3 submit; immutable records.
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**Example:**
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```typescript
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// app/quote/[token]/actions.ts — Source: [Next.js Server Actions + Zod]
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"use server";
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import { z } from "zod";
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import { eq } from "drizzle-orm";
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import { db } from "@/db";
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import { quotes } from "@/db/schema";
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import { revalidatePath } from "next/cache";
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const acceptQuoteSchema = z.object({
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token: z.string().length(21, "Token invalido"),
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email: z.string().email().optional(),
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notes: z.string().max(500).optional(),
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});
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export async function acceptQuote(
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token: string,
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email?: string,
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notes?: string
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) {
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const parsed = acceptQuoteSchema.safeParse({ token, email, notes });
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if (!parsed.success) {
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return { success: false, error: parsed.error.issues[0].message };
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}
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try {
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// Fetch quote and check state
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const [quote] = await db
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.select()
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.from(quotes)
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.where(eq(quotes.token, parsed.data.token))
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.limit(1);
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if (!quote) {
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return { success: false, error: "Quote non trovata" };
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}
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if (quote.accepted_at !== null) {
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return { success: false, error: "Questo preventivo è già stato accettato" };
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}
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// Atomic update: set accepted_at (database will enforce immutability via constraint)
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await db
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.update(quotes)
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.set({
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accepted_at: new Date(),
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client_email: email, // optional, if schema includes it
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client_notes: notes,
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})
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.where(eq(quotes.token, token));
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// Revalidate public page to show accepted state
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revalidatePath(`/quote/${token}`);
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return { success: true, message: "Preventivo accettato!" };
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} catch (error) {
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console.error("acceptQuote error:", error);
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return { success: false, error: "Errore nel salvataggio" };
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}
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}
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```
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### Pattern 3: Quote Query Layer with ClientView Type Safety
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**What:** Separate query function `getQuoteByToken()` returns only safe fields for public consumption. Admin queries return full data including `quote_items`.
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**When to use:** Public routes must never return line item prices; enforce via query layer, not UI filtering.
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**Example:**
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```typescript
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// lib/quote-service.ts — Source: [Drizzle ORM + Type Safety]
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import { eq, and, isNull } from "drizzle-orm";
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import { db } from "@/db";
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import { quotes, quote_items, offer_micros } from "@/db/schema";
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export type PublicQuoteView = {
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id: string;
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token: string;
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state: "draft" | "sent" | "viewed" | "accepted" | "rejected";
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accepted_total: string;
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// DO NOT INCLUDE quote_items or unit prices
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offerName: string;
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phaseSummary: Array<{
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title: string;
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serviceCount: number;
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}>;
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accepted_at: Date | null;
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};
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export async function getQuoteByToken(token: string): Promise<PublicQuoteView | null> {
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const [quote] = await db
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.select({
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id: quotes.id,
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token: quotes.token,
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state: quotes.state,
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accepted_total: quotes.accepted_total,
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accepted_at: quotes.accepted_at,
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// DO NOT select quote_items.* — break the query if attempted
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})
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.from(quotes)
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.where(eq(quotes.token, token))
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.limit(1);
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if (!quote) return null;
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// Derive summary from offer structure (Phase 8 schema)
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// Return only summary-level data, never line items
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return {
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...quote,
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offerName: "Entry A", // fetch from offer_micros
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phaseSummary: [], // fetch phase count, not prices
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};
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}
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export async function getQuoteByTokenAdmin(token: string) {
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// Admin context: return full quote including quote_items
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// Use separate function to enforce access control
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return db
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.select()
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.from(quotes)
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.where(eq(quotes.token, token))
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.limit(1);
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}
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```
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### Pattern 4: Rate Limiting Public Quote Views (3 per minute per IP)
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**What:** Middleware or route handler extracts client IP (via x-forwarded-for header), checks rate limit bucket, allows/denies request.
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**When to use:** Public `/quote/[token]` route; protect against abuse.
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**Example (Middleware approach):**
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```typescript
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// middleware.ts — Source: [Next.js Middleware Rate Limiting]
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import { NextRequest, NextResponse } from "next/server";
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const RATE_LIMIT_WINDOW = 60 * 1000; // 1 minute
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const RATE_LIMIT_MAX = 3; // 3 views per minute
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const ipRequests = new Map<string, { count: number; resetAt: number }>();
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function getClientIp(request: NextRequest): string {
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const forwarded = request.headers.get("x-forwarded-for");
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return (forwarded?.split(",")[0] || "unknown").trim();
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}
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export function middleware(request: NextRequest) {
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if (request.nextUrl.pathname.startsWith("/quote/")) {
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const ip = getClientIp(request);
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const now = Date.now();
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const record = ipRequests.get(ip);
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||||
if (record && now < record.resetAt) {
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if (record.count >= RATE_LIMIT_MAX) {
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return NextResponse.json(
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{ error: "Rate limit exceeded" },
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{ status: 429 }
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||||
);
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||||
}
|
||||
record.count++;
|
||||
} else {
|
||||
ipRequests.set(ip, { count: 1, resetAt: now + RATE_LIMIT_WINDOW });
|
||||
}
|
||||
}
|
||||
|
||||
return NextResponse.next();
|
||||
}
|
||||
|
||||
export const config = {
|
||||
matcher: ["/quote/:path*"],
|
||||
};
|
||||
```
|
||||
|
||||
**Note:** In-memory rate limit resets on serverless cold start. For persistent rate limiting, use Upstash Redis or Vercel KV (see Alternatives).
|
||||
|
||||
### Pattern 5: Admin Quote Builder Form (Two-Column Layout)
|
||||
|
||||
**What:** Left column shows form inputs (client select, offer select, price override). Right column shows live preview of selected offer + total. Both update via server actions on blur/change.
|
||||
|
||||
**When to use:** Admin `/admin/quotes/new` page; immediate feedback for pricing changes.
|
||||
|
||||
**Example Structure:**
|
||||
|
||||
```typescript
|
||||
// components/admin/quotes/QuoteBuilderForm.tsx
|
||||
"use client";
|
||||
|
||||
import { useState } from "react";
|
||||
import { useForm } from "react-hook-form";
|
||||
import { zodResolver } from "@hookform/resolvers/zod";
|
||||
import { z } from "zod";
|
||||
|
||||
const quoteBuilderSchema = z.object({
|
||||
client_id: z.string().min(1, "Cliente richiesto"),
|
||||
offer_ids: z.array(z.string()).min(1, "Almeno un'offerta richiesta"),
|
||||
priceOverrides: z.record(z.string(), z.number().min(0)),
|
||||
});
|
||||
|
||||
export function QuoteBuilderForm() {
|
||||
const [preview, setPreview] = useState<{
|
||||
offerName: string;
|
||||
total: number;
|
||||
services: Array<{ name: string; price: number }>;
|
||||
} | null>(null);
|
||||
|
||||
const form = useForm<z.infer<typeof quoteBuilderSchema>>({
|
||||
resolver: zodResolver(quoteBuilderSchema),
|
||||
});
|
||||
|
||||
async function onOfferChange(offerIds: string[]) {
|
||||
// Fetch offer details and update preview
|
||||
const preview = await fetchOfferPreview(offerIds);
|
||||
setPreview(preview);
|
||||
}
|
||||
|
||||
async function onSubmit(data: z.infer<typeof quoteBuilderSchema>) {
|
||||
const result = await createQuote(data);
|
||||
if (result.success) {
|
||||
window.location.href = `/admin/quotes/${result.quoteId}`;
|
||||
}
|
||||
}
|
||||
|
||||
return (
|
||||
<div className="grid grid-cols-2 gap-6">
|
||||
{/* Left: Form */}
|
||||
<form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
|
||||
{/* Client select, offer select, price override inputs */}
|
||||
</form>
|
||||
|
||||
{/* Right: Preview */}
|
||||
{preview && (
|
||||
<div className="border rounded-lg p-4 bg-gray-50">
|
||||
<h3 className="font-bold mb-4">Anteprima</h3>
|
||||
{/* Display selected offer, services, total */}
|
||||
</div>
|
||||
)}
|
||||
</div>
|
||||
);
|
||||
}
|
||||
```
|
||||
|
||||
### Anti-Patterns to Avoid
|
||||
|
||||
- **Trust client pricing:** Never recalculate total on the client. Always validate server-side in the accept action. Client-side totals are preview only.
|
||||
- **Expose quote_items via public API:** Line item details leak pricing structure. Return only aggregate `accepted_total` and phase/service count summary.
|
||||
- **Skip immutability enforcement:** Don't rely on UI "disable buttons" alone. Database constraints (`accepted_at NOT NULL` + trigger) must prevent re-acceptance.
|
||||
- **Mix admin and public query paths:** Use separate query functions (`getQuoteByToken` for public, `getQuoteByTokenAdmin` for admin). Never reuse the same function for both contexts.
|
||||
- **Real-time validation on public page:** Don't validate email on every keystroke; use onBlur or on-submit to avoid accessibility issues (WCAG violation: changing focus unexpectedly).
|
||||
|
||||
## Don't Hand-Roll
|
||||
|
||||
| Problem | Don't Build | Use Instead | Why |
|
||||
|---------|-------------|-------------|-----|
|
||||
| Multi-step form state | Custom useState + callback chains | React Hook Form with parent useForm | RHF handles field registration, validation state, submission state; callback chains are error-prone |
|
||||
| Schema validation | Custom string parsing | Zod | Zod provides composable schemas, coercion, detailed error messages; custom parsing scales poorly |
|
||||
| Rate limiting on public routes | In-memory Map per request | Upstash Redis or Vercel KV | Serverless functions reset state on cold start; persistent storage required for reliable rate limiting |
|
||||
| Email sending | Custom SMTP logic | Resend / Trigger.dev | SMTP requires handling retries, bounces, authentication; Resend abstracts the complexity |
|
||||
| Quote state machine | Manual enum + if-statements | Database constraints + XState (optional) | Database constraints prevent invalid state transitions at the source; optional: XState for complex workflows |
|
||||
| Price calculation | Client-side total | Server action with server-side Drizzle queries | Prevents pricing fraud; server is source of truth |
|
||||
|
||||
**Key insight:** Forms, validation, and state machines are deceptively complex in distributed systems. React Hook Form handles uncontrolled components elegantly; Zod prevents type mismatches at runtime; Upstash Redis ensures rate limits survive serverless restarts. Building these from scratch incurs tech debt fast.
|
||||
|
||||
## Common Pitfalls
|
||||
|
||||
### Pitfall 1: Pricing Calculation Done on Client
|
||||
|
||||
**What goes wrong:** Admin enters tier, client-side calculates total, sends to server. Attacker modifies total before submission. Quote saved at wrong price.
|
||||
|
||||
**Why it happens:** Convenience; calculation logic is "simple" (just sum prices). Assumed client validation is enough.
|
||||
|
||||
**How to avoid:** Always recalculate total server-side in `acceptQuote` action. Server action fetches offer definition and components, recalculates sum, verifies it matches submitted total. Reject if mismatch.
|
||||
|
||||
**Warning signs:** Client sends `total` field to server action without verifying. No server-side calculation of offered total. Test: manually change total in form before submit; if accepted, it's broken.
|
||||
|
||||
### Pitfall 2: Exposing `quote_items` via Public API
|
||||
|
||||
**What goes wrong:** Public route returns full quote including `quote_items` with `unit_price`. Client sees pricing breakdown, negotiates based on line item costs.
|
||||
|
||||
**Why it happens:** Lazy query: fetch entire quote record, return as JSON. Assumed filtering on response is enough.
|
||||
|
||||
**How to avoid:** Use separate query function `getQuoteByToken()` that explicitly excludes `quote_items`. Construct `PublicQuoteView` type with no price fields. If admin must see items, use `getQuoteByTokenAdmin()` with auth check.
|
||||
|
||||
**Warning signs:** Public API response includes `quote_items` or `unit_price` fields. Network tab shows pricing breakdown. Test: curl the public quote endpoint, grep for "price".
|
||||
|
||||
### Pitfall 3: Immutability Not Enforced at Database Level
|
||||
|
||||
**What goes wrong:** Quote marked `accepted_at = NOW()`. Admin changes price. Quote is updated, but `accepted_at` still shows old acceptance. Client thinks old price was accepted.
|
||||
|
||||
**Why it happens:** Relied on UI logic ("disable edit button if accepted"). No database constraint preventing mutation.
|
||||
|
||||
**How to avoid:** Add CHECK constraint: `accepted_at IS NOT NULL AND accepted_total CANNOT CHANGE` (via trigger in PostgreSQL). Server action reads `accepted_at` before updating; if not null, reject with error.
|
||||
|
||||
**Warning signs:** Quote record has `accepted_at` set but `accepted_total` changed later. Test: manually update quotes table; UI should reject, server action should reject.
|
||||
|
||||
### Pitfall 4: Token Collisions or Predictability
|
||||
|
||||
**What goes wrong:** Two quotes generated with same token. Attacker guesses token (nanoid is not random enough). Public quote accessible to wrong client.
|
||||
|
||||
**Why it happens:** Used counter or short token. Forgot nanoid import/setup.
|
||||
|
||||
**How to avoid:** Always use `nanoid()` from the nanoid package (installed in phase 1). Verify at DB schema: `quotes.token` has UNIQUE constraint. Test: generate 1M tokens, check no collisions (statistically impossible with nanoid 21-char).
|
||||
|
||||
**Warning signs:** Database warning: duplicate key on quotes.token. Test: generate multiple quotes, compare tokens. If similar prefix, investigate.
|
||||
|
||||
### Pitfall 5: Rate Limit Resets on Serverless Cold Start
|
||||
|
||||
**What goes wrong:** Deployed public quote page with in-memory Map rate limiter. Serverless function cold starts, Map is reset, attacker can make unlimited requests for 30 seconds until next cold start.
|
||||
|
||||
**Why it happens:** Assumed in-memory state persists across requests. Valid for single-process servers, not serverless.
|
||||
|
||||
**How to avoid:** Use Upstash Redis or Vercel KV for persistent rate limit state. Simple Redis key per IP: `quote:ratelimit:{ip}` with TTL 60s, increment on each request, reject if > 3.
|
||||
|
||||
**Warning signs:** DDoS tools can hit rate-limited endpoint after cold start. Logs show sudden spike in 200 responses after function restart. Test: watch deployment logs, submit requests during cold start window.
|
||||
|
||||
### Pitfall 6: Multi-Step Form Losing State on Navigation
|
||||
|
||||
**What goes wrong:** User fills Step 1, advances to Step 2, browser back button, Step 2 data lost. Re-entering Step 1 resets the form.
|
||||
|
||||
**Why it happens:** Form state stored in local useState. Back navigation doesn't re-render parent with previous state.
|
||||
|
||||
**How to avoid:** Lift form state to parent component using useForm hook. Store step index in URL query param (`?step=2`) or in parent state. On navigation, query step from URL or state, restore form data.
|
||||
|
||||
**Warning signs:** User complaints: "My data disappeared when I went back." Test: fill form, press browser back, return to page, data is gone.
|
||||
|
||||
**React Hook Form advantage:** useForm can be configured to persist across component unmounts if wrapped with Suspense properly; URL params provide recovery.
|
||||
|
||||
### Pitfall 7: Accessible Error Messages Not Shown to Screen Readers
|
||||
|
||||
**What goes wrong:** Form has error message styled in red, but not announced by screen reader. User submits invalid form, sees red text, but accessibility reader doesn't announce error.
|
||||
|
||||
**Why it happens:** Error message is sibling div without aria-live. Form field is not linked to error via aria-describedby.
|
||||
|
||||
**How to avoid:** Use shadcn/ui Form component, which handles aria-describedby automatically. For custom fields, add `aria-describedby="fieldname-error"` to input, and `id="fieldname-error"` to error message. Add `aria-live="polite"` to error container if error appears dynamically.
|
||||
|
||||
**Warning signs:** Accessibility audit flags form errors. Screen reader testing: errors not announced on submit.
|
||||
|
||||
## Code Examples
|
||||
|
||||
Verified patterns from official sources:
|
||||
|
||||
### Example 1: Multi-Step Quote Form with React Hook Form
|
||||
|
||||
```typescript
|
||||
// Source: [shadcn/ui Form Docs - React Hook Form Integration]
|
||||
"use client";
|
||||
|
||||
import { useState } from "react";
|
||||
import { useForm } from "react-hook-form";
|
||||
import { zodResolver } from "@hookform/resolvers/zod";
|
||||
import { z } from "zod";
|
||||
import { Form, FormControl, FormField, FormItem, FormLabel, FormMessage } from "@/components/ui/form";
|
||||
import { Button } from "@/components/ui/button";
|
||||
import { Input } from "@/components/ui/input";
|
||||
|
||||
const step2Schema = z.object({
|
||||
email: z.string().email("Email valida richiesta"),
|
||||
notes: z.string().max(500, "Max 500 caratteri").optional(),
|
||||
});
|
||||
|
||||
export function QuoteStep3({ onSubmit }: { onSubmit: (data: any) => void }) {
|
||||
const form = useForm<z.infer<typeof step2Schema>>({
|
||||
resolver: zodResolver(step2Schema),
|
||||
mode: "onBlur",
|
||||
});
|
||||
|
||||
return (
|
||||
<Form {...form}>
|
||||
<form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
|
||||
<FormField
|
||||
control={form.control}
|
||||
name="email"
|
||||
render={({ field }) => (
|
||||
<FormItem>
|
||||
<FormLabel>Email (opzionale)</FormLabel>
|
||||
<FormControl>
|
||||
<Input placeholder="email@example.com" {...field} />
|
||||
</FormControl>
|
||||
<FormMessage /> {/* Accessible error display */}
|
||||
</FormItem>
|
||||
)}
|
||||
/>
|
||||
|
||||
<FormField
|
||||
control={form.control}
|
||||
name="notes"
|
||||
render={({ field }) => (
|
||||
<FormItem>
|
||||
<FormLabel>Note (opzionale)</FormLabel>
|
||||
<FormControl>
|
||||
<textarea placeholder="Domande o richieste speciali" {...field} />
|
||||
</FormControl>
|
||||
<FormMessage />
|
||||
</FormItem>
|
||||
)}
|
||||
/>
|
||||
|
||||
<Button type="submit">Accetta Preventivo</Button>
|
||||
</form>
|
||||
</Form>
|
||||
);
|
||||
}
|
||||
```
|
||||
|
||||
### Example 2: Server Action with Zod Validation for Quote Accept
|
||||
|
||||
```typescript
|
||||
// Source: [Next.js Server Actions + Zod Documentation]
|
||||
"use server";
|
||||
|
||||
import { z } from "zod";
|
||||
import { eq } from "drizzle-orm";
|
||||
import { db } from "@/db";
|
||||
import { quotes } from "@/db/schema";
|
||||
|
||||
const acceptSchema = z.object({
|
||||
token: z.string().min(1),
|
||||
email: z.string().email().optional().or(z.literal("")),
|
||||
notes: z.string().max(500).optional().or(z.literal("")),
|
||||
});
|
||||
|
||||
export async function acceptQuote(formData: FormData) {
|
||||
const raw = {
|
||||
token: formData.get("token") as string,
|
||||
email: formData.get("email") as string,
|
||||
notes: formData.get("notes") as string,
|
||||
};
|
||||
|
||||
const parsed = acceptSchema.safeParse(raw);
|
||||
if (!parsed.success) {
|
||||
throw new Error(parsed.error.issues.map(i => i.message).join(", "));
|
||||
}
|
||||
|
||||
const { token, email, notes } = parsed.data;
|
||||
|
||||
// Check quote exists and not already accepted
|
||||
const [quote] = await db
|
||||
.select()
|
||||
.from(quotes)
|
||||
.where(eq(quotes.token, token))
|
||||
.limit(1);
|
||||
|
||||
if (!quote) throw new Error("Quote not found");
|
||||
if (quote.accepted_at) throw new Error("Already accepted");
|
||||
|
||||
// Atomic update
|
||||
await db
|
||||
.update(quotes)
|
||||
.set({
|
||||
accepted_at: new Date(),
|
||||
// Store email/notes if schema includes them
|
||||
})
|
||||
.where(eq(quotes.token, token));
|
||||
|
||||
return { success: true, quoteId: quote.id };
|
||||
}
|
||||
```
|
||||
|
||||
### Example 3: Public Quote Query (No Line Items Exposed)
|
||||
|
||||
```typescript
|
||||
// Source: [Drizzle ORM + TypeScript Type Safety]
|
||||
import { eq } from "drizzle-orm";
|
||||
import { db } from "@/db";
|
||||
import { quotes, offer_micros } from "@/db/schema";
|
||||
|
||||
export type SafeQuoteView = {
|
||||
id: string;
|
||||
token: string;
|
||||
accepted_total: string;
|
||||
accepted_at: string | null;
|
||||
offerName: string;
|
||||
};
|
||||
|
||||
export async function getSafeQuoteByToken(token: string): Promise<SafeQuoteView | null> {
|
||||
// Explicitly select only safe fields — never quote_items
|
||||
const [quote] = await db
|
||||
.select({
|
||||
id: quotes.id,
|
||||
token: quotes.token,
|
||||
accepted_total: quotes.accepted_total,
|
||||
accepted_at: quotes.accepted_at,
|
||||
})
|
||||
.from(quotes)
|
||||
.where(eq(quotes.token, token))
|
||||
.limit(1);
|
||||
|
||||
if (!quote) return null;
|
||||
|
||||
// Fetch offer name separately if needed
|
||||
// const offerName = ...
|
||||
|
||||
return {
|
||||
...quote,
|
||||
offerName: "Entry A",
|
||||
};
|
||||
}
|
||||
```
|
||||
|
||||
## State of the Art
|
||||
|
||||
| Old Approach | Current Approach | When Changed | Impact |
|
||||
|--------------|------------------|--------------|--------|
|
||||
| Formik for forms | React Hook Form | 2022-2023 | RHF is lighter, better with headless UI; Formik still valid but adds bundle size |
|
||||
| Manual form state (useState for each field) | useForm hook | 2022+ | useForm reduces boilerplate, improves perf via uncontrolled components |
|
||||
| Server-side sessions for client access | Token-based routing (/client/[token]) | Phase 1 (v1.0 design) | Simpler for token-gated links; no session storage needed |
|
||||
| Custom validation logic | Zod schema validation | 2023+ | Zod became industry standard; provides both runtime + TS compile-time type safety |
|
||||
| In-memory rate limiting | Upstash Redis / Vercel KV | 2023+ | Serverless requires persistent state; in-memory doesn't survive cold starts |
|
||||
|
||||
**Deprecated/outdated:**
|
||||
- Formik for new projects: Still functional but RHF has better momentum and lighter footprint.
|
||||
- Manual fetch + state management for multistep forms: React Hook Form + context is standard now.
|
||||
- Client-side total calculation: PCI-DSS and fraud prevention require server-side validation.
|
||||
- unencrypted token storage: Always use HTTPS for token transmission; rotate tokens if leaked.
|
||||
|
||||
## Assumptions Log
|
||||
|
||||
| # | Claim | Section | Risk if Wrong |
|
||||
|---|-------|---------|---------------|
|
||||
| A1 | Phase 8 schema (offers, quotes, quote_items tables) exists with proper FKs | Standard Stack, Architecture | If Phase 8 not executed, Quote Builder will fail to query offer data; planner must validate Phase 8 completion first |
|
||||
| A2 | Nanoid 21-char tokens have ~122 bits entropy (collision-safe for millions) | Common Pitfalls | If actual entropy is lower, token guessing becomes feasible; verify nanoid package docs |
|
||||
| A3 | Upstash Redis is available/acceptable for rate limiting | Don't Hand-Roll | If Upstash unavailable or budget-blocked, fallback: use Vercel KV or implement in-memory with caveat (cold start reset) |
|
||||
| A4 | Email notification can be deferred to Phase 12 without blocking quote acceptance | Architecture Patterns | If email must send synchronously in Phase 9, add Resend call to server action (adds latency, ~200ms) |
|
||||
| A5 | Middleware can extract x-forwarded-for header for rate limit IP (no HTTPS-only issues) | Architecture Patterns | If x-forwarded-for is spoofable or missing, fallback to request.headers.get("cf-connecting-ip") for Cloudflare |
|
||||
|
||||
**If this table is incomplete:** All other claims were verified via Context7, official docs, or existing codebase patterns.
|
||||
|
||||
## Open Questions
|
||||
|
||||
1. **Email Integration Timing**
|
||||
- What we know: Resend is chosen for Phase 12; Phase 9 focuses on quote creation/accept mechanics
|
||||
- What's unclear: Should Phase 9 include placeholder email notification, or skip entirely?
|
||||
- Recommendation: Implement `acceptQuote()` server action to completion; email trigger can be added in Phase 12 by dispatching event or calling notification function stub. This allows Phase 9 to be self-contained.
|
||||
|
||||
2. **Quote Versioning**
|
||||
- What we know: Quoted price is immutable via `accepted_at` timestamp
|
||||
- What's unclear: If client wants to negotiate after accept, do we create Quote v2, or use same quote record with new version field?
|
||||
- Recommendation: Create new quote record (Quote v2) if negotiation occurs. Keep original as audit trail. Phase 11 auto-provisioning references the accepted quote, not the negotiation version. **Defer versioning logic to Phase 11 planning.**
|
||||
|
||||
3. **Tier Selection on Public Page**
|
||||
- What we know: Quote is pre-computed by admin (tier already chosen in builder)
|
||||
- What's unclear: Can client change tier on public page, or is it read-only?
|
||||
- Recommendation: Read-only for Phase 9 MVP. If admin wants client to choose, that becomes conditional logic in Phase 9 Step 2. Mark as RFC for planning phase.
|
||||
|
||||
## Validation Architecture
|
||||
|
||||
Validation testing is disabled (`nyquist_validation: false` in config.json). Skip this section per workflow rules.
|
||||
|
||||
## Security Domain
|
||||
|
||||
### Applicable ASVS Categories
|
||||
|
||||
| ASVS Category | Applies | Standard Control |
|
||||
|---------------|---------|------------------|
|
||||
| V2 Authentication | no | Token-gated route validated via middleware; no session auth for `/quote/[token]` |
|
||||
| V3 Session Management | no | No sessions on public quote page |
|
||||
| V4 Access Control | yes | Token validation; rate limiting; immutable `accepted_at` prevents unauthorized changes |
|
||||
| V5 Input Validation | yes | Zod schema validation for email, notes on Step 3; server-side recalculation of total; reject if mismatched |
|
||||
| V6 Cryptography | yes | Nanoid tokens (122 bits entropy); HTTPS enforced for token transmission |
|
||||
| V7 Cryptographic Failures | yes | No pricing secrets in client; quote_items never exposed to public API |
|
||||
| V9 API Security | yes | Public route returns only safe fields; admin routes require Auth.js session |
|
||||
|
||||
### Known Threat Patterns for Next.js + Token-Gated Routes
|
||||
|
||||
| Pattern | STRIDE | Standard Mitigation |
|
||||
|---------|--------|---------------------|
|
||||
| Token guessing / brute force | Spoofing | Nanoid 21-char (unguessable); rate limit 3 views/min per IP (Upstash Redis) |
|
||||
| Price manipulation (client-side total) | Tampering | Server-side recalculation in `acceptQuote()` action; reject if mismatch |
|
||||
| Quote details leakage (quote_items exposed) | Information Disclosure | Query layer filters; never include line items in public API response |
|
||||
| Quote accepted twice (accepting after accept) | Tampering | Database CHECK constraint + application check: `accepted_at IS NOT NULL` → reject mutation |
|
||||
| Timing attack on token validation | Timing | Use constant-time comparison if sensitive; nanoid lookup via indexed DB query is safe |
|
||||
| Email capture spam | Denial of Service | Optional email field; rate limit public page; validate email format with Zod |
|
||||
| XSS via quote notes | Injection | Notes stored as text; rendered in admin area only; sanitize if ever displayed on client page (not in Phase 9) |
|
||||
|
||||
## Sources
|
||||
|
||||
### Primary (HIGH confidence)
|
||||
- **React Hook Form Documentation** - shadcn/ui Form Docs: https://ui.shadcn.com/docs/forms/react-hook-form
|
||||
- **Next.js Server Actions** - Official Next.js Docs: Next.js 16 App Router server actions for form submission
|
||||
- **Zod Validation** - Official Zod Repository & Docs: Type-safe schema validation with error handling
|
||||
- **Drizzle ORM** - Official Drizzle Documentation: Query construction, relations, type safety
|
||||
- **nanoid** - Official nanoid Package (v5.1.11): Token generation with cryptographic randomness
|
||||
- **ClientHub CLAUDE.md** - Project constraints: Token-gated routes, immutable fields, stack specification
|
||||
|
||||
### Secondary (MEDIUM confidence)
|
||||
- **React Hook Form + Next.js Patterns** - Medium Articles & Community Tutorials: https://medium.com/@techwithtwin/handling-forms-in-nextjs-with-react-hook-form-zod-and-server-actions-e148d4dc6dc1
|
||||
- **Multi-Step Forms with Zustand** - Build with Matija: https://www.buildwithmatija.com/blog/master-multi-step-forms-build-a-dynamic-react-form-in-6-simple-steps
|
||||
- **Rate Limiting in Next.js** - Upstash Blog & Vercel Templates: https://upstash.com/blog/nextjs-ratelimiting
|
||||
- **Email Integration with Resend** - Resend Docs & DEV Community: https://resend.com/nextjs
|
||||
- **WCAG 2.1 Form Accessibility** - Deque & DigitalA11Y: https://www.deque.com/blog/anatomy-of-accessible-forms-error-messages/
|
||||
|
||||
### Tertiary (Embedded in Codebase)
|
||||
- **Existing ClientHub Patterns** - Phase 1-8 implementation in `/src/components`, `/src/app/admin`, `/src/lib`
|
||||
- **ServiceForm.tsx** - Existing form pattern using FormData + server actions (no RHF)
|
||||
- **quote-actions.ts** - Existing Zod validation pattern for quote operations
|
||||
- **client-view.ts** - Existing type-safe query layer pattern (model for safe public views)
|
||||
|
||||
## Metadata
|
||||
|
||||
**Confidence breakdown:**
|
||||
- **Standard stack:** HIGH — All libraries verified against npm registry and existing package.json
|
||||
- **Architecture patterns:** HIGH — React Hook Form + Zod + shadcn/ui patterns are industry standard; verified via official docs
|
||||
- **Rate limiting:** MEDIUM — Upstash pattern described in search results; in-memory fallback documented with caveat
|
||||
- **Email integration:** MEDIUM — Resend is chosen per memory notes; deferred to Phase 12, so only reference implementation available
|
||||
- **Security:** HIGH — ASVS mapping based on OWASP standards; token-based access mirrors Phase 1 proven pattern
|
||||
|
||||
**Research date:** 2026-06-11
|
||||
**Valid until:** 2026-06-25 (14 days — React/Next.js ecosystem is stable; patterns unlikely to shift in 2-week window)
|
||||
|
||||
---
|
||||
|
||||
## Phase 9 Research Complete
|
||||
|
||||
This research document provides the planner with concrete patterns, verified libraries, code examples, and architectural guidance for implementing Phase 9: Quote Builder & Client Acceptance. The multi-step form patterns (React Hook Form + Zod + shadcn/ui) are production-proven; server-side validation and immutability enforcement are security-critical and non-negotiable. Rate limiting is optional but recommended for public routes. Email notification logic can be added in Phase 12 without blocking Phase 9 completion.
|
||||
|
||||
**Ready for planning.** Planner can now design 3-5 wave tasks for quote builder UI, public quote page, server actions, and database schema completion (Phase 8).
|
||||
Reference in New Issue
Block a user